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DETERMINATION OF METALS IN SOLID SAMPLES BY COMPLEXATION-SFE AND GC-ATOMIC EMISSION DETECTION
Citation:
Liu, Y., V. Lopez-Avila, M. Alcaraz, W. Beckert, AND E. Heithmar. DETERMINATION OF METALS IN SOLID SAMPLES BY COMPLEXATION-SFE AND GC-ATOMIC EMISSION DETECTION. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/288.
Description:
Complexation followed by SFE has been investigated for the extraction of Cu2+, Co2+, Cd2+, and Zn2+ ions from solid samples. ithium bis(trifluoroethyl)dithiocarbamate (FDDC) was used as the complexing agent in this study. he metal-FDDC complexes in the SFE extracts were determined by GC with atomic emission detection. he recoveries of Cu2+, Co2+, Cd2+, and Zn2+ ions from filter paper, sand, and silica gel ranged from 70 to 100 percent. elatively high concentrations of complexed Cu, Co, Cd, and Zn found in system blanks obtained with a stainless steel SFE system prompted us to modify the apparatus by using nonmetallic polyetherether-ketone (PEEK) components. evels of these metals in system blanks generated using the modified system were only 10 to 30 percent of those generated using the stainless steel system.